78423943392 has 120 divisors (see below), whose sum is σ = 242781877800. Its totient is φ = 24765440256.

The previous prime is 78423943337. The next prime is 78423943399. The reversal of 78423943392 is 29334932487.

78423943392 is a `hidden beast` number, since 78 + 4 + 239 + 4 + 339 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78423943399) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 746967 + ... + 845462.

It is an arithmetic number, because the mean of its divisors is an integer number (2023182315).

Almost surely, 2^78423943392 is an apocalyptic number.

78423943392 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

78423943392 is an abundant number, since it is smaller than the sum of its proper divisors (164357934408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78423943392 is a wasteful number, since it uses less digits than its factorization.

78423943392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592470 (or 1592453 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 54.

The spelling of 78423943392 in words is "seventy-eight billion, four hundred twenty-three million, nine hundred forty-three thousand, three hundred ninety-two".